---
_id: '2027'
abstract:
- lang: eng
text: "\r\nMagnetic nanoparticles can be used for medical and other purposes, but
can also be integrated in polymeric or other nonmagnetic matrices of diverse shapes,
for example, thin-films or fibers. In the latter case, it may be important how
the magnetic nanoparticles are distributed in the matrix, a topic which is often
not taken into account when such composites are investigated experimentally or
theoretically. Especially for small magnetic nanoparticles of dimensions allowing
coherent reversal, the magnetic properties of such polymer/magnet composites can
change drastically in the case of agglomerations. Here, a method is suggested
to quantify the influence of nanoparticle distributions inside nonmagnetic matrices.
By changing the average distance between nanoparticles of varying diameters between
highly distributed particles and perfectly packed clusters, different magnetization
dynamics can be modeled by micromagnetic simulations. Here, this process is shown
for various magnetic materials and diameter distributions of magnetic nano-spheres
and present corresponding micromagnetic simulation results, which underline the
importance of taking into account possible magnetic agglomerations in nonmagnetic
space."
article_number: '2100381'
article_type: original
author:
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Jacek
full_name: Grzybowski, Jacek
last_name: Grzybowski
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
citation:
alphadin: 'Blachowicz, Tomasz ; Grzybowski, Jacek ; Ehrmann,
Andrea: Micromagnetic Simulations of Nanoparticles with Varying Amount
of Agglomeration. In: Macromolecular Symposia Bd. 402, Wiley (2022), Nr. 1'
ama: Blachowicz T, Grzybowski J, Ehrmann A. Micromagnetic Simulations of Nanoparticles
with Varying Amount of Agglomeration. Macromolecular Symposia. 2022;402(1).
doi:10.1002/masy.202100381
apa: Blachowicz, T., Grzybowski, J., & Ehrmann, A. (2022). Micromagnetic Simulations
of Nanoparticles with Varying Amount of Agglomeration. Macromolecular Symposia,
402(1). https://doi.org/10.1002/masy.202100381
bibtex: '@article{Blachowicz_Grzybowski_Ehrmann_2022, title={Micromagnetic Simulations
of Nanoparticles with Varying Amount of Agglomeration}, volume={402}, DOI={10.1002/masy.202100381}, number={12100381},
journal={Macromolecular Symposia}, publisher={Wiley}, author={Blachowicz, Tomasz
and Grzybowski, Jacek and Ehrmann, Andrea}, year={2022} }'
chicago: Blachowicz, Tomasz, Jacek Grzybowski, and Andrea Ehrmann. “Micromagnetic
Simulations of Nanoparticles with Varying Amount of Agglomeration.” Macromolecular
Symposia 402, no. 1 (2022). https://doi.org/10.1002/masy.202100381.
ieee: T. Blachowicz, J. Grzybowski, and A. Ehrmann, “Micromagnetic Simulations of
Nanoparticles with Varying Amount of Agglomeration,” Macromolecular Symposia,
vol. 402, no. 1, 2022.
mla: Blachowicz, Tomasz, et al. “Micromagnetic Simulations of Nanoparticles with
Varying Amount of Agglomeration.” Macromolecular Symposia, vol. 402, no.
1, 2100381, Wiley, 2022, doi:10.1002/masy.202100381.
short: T. Blachowicz, J. Grzybowski, A. Ehrmann, Macromolecular Symposia 402 (2022).
date_created: 2022-07-14T17:46:15Z
date_updated: 2024-03-27T14:01:14Z
doi: 10.1002/masy.202100381
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2022-07-14T17:45:20Z
date_updated: 2022-07-14T17:45:20Z
file_id: '2028'
file_name: _2022_Blachowicz_MacromolSymp402_2100381.pdf
file_size: 3179355
relation: main_file
success: 1
file_date_updated: 2022-07-14T17:45:20Z
has_accepted_license: '1'
intvolume: ' 402'
issue: '1'
keyword:
- iron
- collapse
- cross-section
- permalloy
- spherical coordinates
- virtual sphere
language:
- iso: eng
oa: '1'
publication: Macromolecular Symposia
publication_identifier:
eissn:
- 1521-3900
issn:
- 1022-1360
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Micromagnetic Simulations of Nanoparticles with Varying Amount of Agglomeration
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
urn: urn:nbn:de:hbz:bi10-20271
user_id: '216459'
volume: 402
year: '2022'
...
---
_id: '669'
abstract:
- lang: eng
text: Magnetic vortices belong to the possibilities to store information in magnetic
structures. Understanding their nucleation and propagation is also of interest
in basic research. While vortices are usually examined in particles of homogeneous
material, here we give an overview of the impact of borders between two materials,
i.e. iron and permalloy, on magnetization reversal and vortex formation in double-wedges
as well as adjacent rectangles of different thickness. While former investigations
of pure iron nanoparticles of similar dimensions revealed different magnetization
reversal magnetisms without vortex, with one or two vortices, the addition of
a permalloy part stabilized the magnetization reversal so that in all situations
under investigation, a single vortex was observed. Our simulations underline the
technological importance of such double-material structures for the preparation
of nanostructures for storage devices with reliable magnetization reversal processes,
stable against erroneous modifications of nanoparticle dimensions and magnetic
field orientations.
article_number: '167294'
article_type: original
author:
- first_name: Devika
full_name: Sudsom, Devika
last_name: Sudsom
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Lothar
full_name: Hahn, Lothar
last_name: Hahn
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
citation:
alphadin: 'Sudsom, Devika ; Blachowicz, Tomasz ; Hahn,
Lothar ; Ehrmann, Andrea:
Vortex nucleation and propagation in magnetic double-wedges and semi-squares for
reliable quaternary storage systems. In: Journal of Magnetism and Magnetic
Materials Bd. 514 (2020)'
ama: Sudsom D, Blachowicz T, Hahn L, Ehrmann A. Vortex nucleation and propagation
in magnetic double-wedges and semi-squares for reliable quaternary storage systems.
Journal of Magnetism and Magnetic Materials. 2020;514. doi:10.1016/j.jmmm.2020.167294
apa: Sudsom, D., Blachowicz, T., Hahn, L., & Ehrmann, A. (2020). Vortex nucleation
and propagation in magnetic double-wedges and semi-squares for reliable quaternary
storage systems. Journal of Magnetism and Magnetic Materials, 514.
https://doi.org/10.1016/j.jmmm.2020.167294
bibtex: '@article{Sudsom_Blachowicz_Hahn_Ehrmann_2020, title={Vortex nucleation
and propagation in magnetic double-wedges and semi-squares for reliable quaternary
storage systems}, volume={514}, DOI={10.1016/j.jmmm.2020.167294},
number={167294}, journal={Journal of Magnetism and Magnetic Materials}, author={Sudsom,
Devika and Blachowicz, Tomasz and Hahn, Lothar and Ehrmann, Andrea}, year={2020}
}'
chicago: Sudsom, Devika, Tomasz Blachowicz, Lothar Hahn, and Andrea Ehrmann. “Vortex
Nucleation and Propagation in Magnetic Double-Wedges and Semi-Squares for Reliable
Quaternary Storage Systems.” Journal of Magnetism and Magnetic Materials
514 (2020). https://doi.org/10.1016/j.jmmm.2020.167294.
ieee: D. Sudsom, T. Blachowicz, L. Hahn, and A. Ehrmann, “Vortex nucleation and
propagation in magnetic double-wedges and semi-squares for reliable quaternary
storage systems,” Journal of Magnetism and Magnetic Materials, vol. 514,
2020.
mla: Sudsom, Devika, et al. “Vortex Nucleation and Propagation in Magnetic Double-Wedges
and Semi-Squares for Reliable Quaternary Storage Systems.” Journal of Magnetism
and Magnetic Materials, vol. 514, 167294, 2020, doi:10.1016/j.jmmm.2020.167294.
short: D. Sudsom, T. Blachowicz, L. Hahn, A. Ehrmann, Journal of Magnetism and Magnetic
Materials 514 (2020).
date_created: 2021-01-03T16:51:38Z
date_updated: 2021-05-21T07:09:59Z
department:
- _id: '103'
doi: 10.1016/j.jmmm.2020.167294
intvolume: ' 514'
keyword:
- Magnetic nanostructures
- Wedges
- Micromagnetic simulation
- Vortex
- Magnetization reversal
- Iron
- Permalloy
- Lithography
language:
- iso: eng
publication: Journal of Magnetism and Magnetic Materials
publication_identifier:
issn:
- 0304-8853
publication_status: published
quality_controlled: '1'
status: public
title: Vortex nucleation and propagation in magnetic double-wedges and semi-squares
for reliable quaternary storage systems
type: journal_article
user_id: '237837'
volume: 514
year: '2020'
...
---
_id: '635'
abstract:
- lang: eng
text: Magnetic vortex structures are of high technological relevance due
to their possible application in magnetic memory. Moreover, investigating magnetization
reversal via vortex formation is an important topic in basic research. Typically,
such vortices are only investigated in homogeneous magnetic materials of diverse
shapes. Here, we report for the first time on micromagnetic simulation of vortex
formation in magnetic bow-tie nanostructures, comprising alternating parts from
iron and permalloy, investigated for two different thicknesses and under different
angles of the external magnetic field. While no vortex was found in pure permalloy
square, nanoparticles of the dimensions investigated in this study and in case
of iron only a relatively thick sample allowed for vortex formation, different
numbers of vortices and antivortices were found in the bow-tie structures prepared
from both materials, depending on the angular field orientation and the sample
thickness. By stabilizing more than one vortex in a confined nanostructure, it
is possible to store more than one bit of information in it. Our micromagnetic
simulations reveal that such bi-material structures are highly relevant not only
for basic research, but also for data storage applications.
article_number: '5'
article_type: original
author:
- first_name: Devika
full_name: Sudsom, Devika
last_name: Sudsom
- first_name: Irén
full_name: Juhász Junger, Irén
last_name: Juhász Junger
- first_name: Christoph
full_name: Döpke, Christoph
last_name: Döpke
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Lothar
full_name: Hahn, Lothar
last_name: Hahn
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
citation:
alphadin: 'Sudsom, Devika ; Juhász Junger, Irén ; Döpke,
Christoph ; Blachowicz, Tomasz
; Hahn, Lothar ; Ehrmann,
Andrea: Micromagnetic Simulation of Vortex Development in Magnetic Bi-Material
Bow-Tie Structures. In: Condensed Matter Bd. 5 (2020), Nr. 1'
ama: Sudsom D, Juhász Junger I, Döpke C, Blachowicz T, Hahn L, Ehrmann A. Micromagnetic
Simulation of Vortex Development in Magnetic Bi-Material Bow-Tie Structures. Condensed
Matter. 2020;5(1). doi:10.3390/condmat5010005
apa: Sudsom, D., Juhász Junger, I., Döpke, C., Blachowicz, T., Hahn, L., & Ehrmann,
A. (2020). Micromagnetic Simulation of Vortex Development in Magnetic Bi-Material
Bow-Tie Structures. Condensed Matter, 5(1). https://doi.org/10.3390/condmat5010005
bibtex: '@article{Sudsom_Juhász Junger_Döpke_Blachowicz_Hahn_Ehrmann_2020, title={Micromagnetic
Simulation of Vortex Development in Magnetic Bi-Material Bow-Tie Structures},
volume={5}, DOI={10.3390/condmat5010005},
number={15}, journal={Condensed Matter}, author={Sudsom, Devika and Juhász Junger,
Irén and Döpke, Christoph and Blachowicz, Tomasz and Hahn, Lothar and Ehrmann,
Andrea}, year={2020} }'
chicago: Sudsom, Devika, Irén Juhász Junger, Christoph Döpke, Tomasz Blachowicz,
Lothar Hahn, and Andrea Ehrmann. “Micromagnetic Simulation of Vortex Development
in Magnetic Bi-Material Bow-Tie Structures.” Condensed Matter 5, no. 1
(2020). https://doi.org/10.3390/condmat5010005.
ieee: D. Sudsom, I. Juhász Junger, C. Döpke, T. Blachowicz, L. Hahn, and A. Ehrmann,
“Micromagnetic Simulation of Vortex Development in Magnetic Bi-Material Bow-Tie
Structures,” Condensed Matter, vol. 5, no. 1, 2020.
mla: Sudsom, Devika, et al. “Micromagnetic Simulation of Vortex Development in Magnetic
Bi-Material Bow-Tie Structures.” Condensed Matter, vol. 5, no. 1, 5, 2020,
doi:10.3390/condmat5010005.
short: D. Sudsom, I. Juhász Junger, C. Döpke, T. Blachowicz, L. Hahn, A. Ehrmann,
Condensed Matter 5 (2020).
date_created: 2021-01-03T14:42:18Z
date_updated: 2021-05-19T14:01:34Z
ddc:
- '530'
department:
- _id: '103'
doi: 10.3390/condmat5010005
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2021-01-03T14:41:31Z
date_updated: 2021-01-03T14:41:31Z
file_id: '636'
file_name: _2020_Sudsom_CondMatter5_5_corr.pdf
file_size: 4886370
relation: main_file
success: 1
file_date_updated: 2021-01-03T14:41:31Z
funded_apc: '1'
has_accepted_license: '1'
intvolume: ' 5'
issue: '1'
keyword:
- magnetic nanostructures
- micromagnetic simulation
- bow-tie structure
- vortex
- magnetization reversal
- iron
- permalloy
- lithography
language:
- iso: eng
oa: '1'
publication: Condensed Matter
publication_identifier:
issn:
- 2410-3896
publication_status: published
quality_controlled: '1'
status: public
title: Micromagnetic Simulation of Vortex Development in Magnetic Bi-Material Bow-Tie
Structures
type: journal_article
user_id: '237837'
volume: 5
year: '2020'
...